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This high friction racing material has grown to be a very popular choice for drivers who need the highest possible friction with a low pad temperature. Developed and tested in the vintage racing community the R4-1 gives an average coefficient of friction of .56 with peak levels up to .600. Having tremendous stopping power, the R4-1 pad material can reach upwards of .5 friction level when pad temperature is a very low 200 F .

Drivers can still have a high friction brake pad without worry of the pad becoming too cold to be effective when the car is driven only moderately. For use when pad temperatures are under 600 F and peak temperatures are not over 1000 F. Widely used on Vintage GT and formula cars the R4-1 has gained great popularity as an excellent auto-cross, off-road and rally-cross pad material. Great modulation, consistent pedal feedback and the same rotor friendliness as our other carbon kevlar compounds.

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Braces tighten feel of the car, reduce NVH, but don't make it faster so don't do those for speed. Ideally do overlay of data with the guy beating you, best ...

-- Brian

REVIEWS

I received the Roadstersport II, and I wanted to compliment you guys on an awesome product. The Miata should have these on from the factory. They make a great sound, that is not obnoxious at all. The exhaust also installed seamlessly!!! I will buy all of my Miata stuff from you in the future.
Thanks,

-- Nate

Brian,
Thank you!!!
We last spoke in November about some upgrades for my 2011 MX5 soft top. It
has finally warmed up in NE Ohio and two relaxed weekends of wrenching on my
car were well worth the effort.
Installation of the RoadsterSport ceramic coated street header was straight
forward and took under 8 hours, including a 40 minute test drive and cleanup
of the garage! Combined with the RoadsterSport Q exhaust, the sound is
fantastic and the increased torque, horsepower and performance make it a
blast to drive.
The addition of the Cobalt shock tower brace, Racing Beat sway bars, ILM
front power train and X braces really enhanced the ride - minimal body roll,
comfortable and very responsive.
Your recommendations really helped transform the car from great to
fantastic. Your research, product development and candid recommendations
make you a standout in the industry.
My only questions are - what's next on my list .... And how soon will my
wife want the same upgrades on her 2012 PRHT ...
Again, thank you!!!
Charles G